How Wall Street works – The Monkey Business

Once upon a time in a village in India, a man announced to the villagers that he would buy monkeys for $10.

The villagers seeing there were many monkeys around, went out to the forest and started catching them.
The man bought thousands at $10, but, as the supply started to diminish, the villagers stopped their efforts. The man further announced that he would now buy at $20. This renewed the efforts of the villagers and they started catching monkeys again.